<html>
    <head>
        <title>钟表</title>
        <meta charset="utf-8">
        <!-- link标签可以引入外部的css文件 -->
        <link rel="stylesheet" href="index.css">

    </head>
    <body>
        <div id="clock" >
            <div id="hp" class="point"></div>
            <div id="mp" class="point"></div>
            <div id="sp"class="point"></div>   
            <div id="dian" class="point"></div>         
        </div>
    </body>
    <!-- 从外部引入一个JS文件 -->
    <script src="index.js"></script>
</html>